1. It's extremely contagious
Stomach flu spreads via the "fecal-oral route," which is just as gross as it sounds. Basically, viruses from infected feces or vomit find their way into our mouths. Very diligent hand washing is your best defense, according to Dr. Rogg.
2. These germs are tough
Compared to other viruses, noroviruses can be surprisingly hardy and live for days on household surfaces, which is why they spread easily.
3. It gets better on its own
Both stomach flu and other types of food poisoning are what doctors call "self-limiting," meaning they play themselves out and rarely require medical treatment.
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